Compressed injection molding

A method of producing an injection molding comprising

• providing a layer of first resin and
• providing a layer of second resin that is provided next to the first resin layer,
• wherein the providing of the layer of first resin comprises
• injecting a predetermined first volume of a molten first resin into an internal cavity of a die assembly, wherein the molten first resin flows into the internal cavity via a first outlet of a first resin channel,
• forming the layer of first resin by advancing a moveable core into the internal cavity to apply a pre-determined first pressure on the molten first resin, such that the volume of the internal cavity is reduced, the advancing of the moveable core is done such that the moveable core closes the first outlet of the first resin channel, and
• measuring a first position of the moveable core,
• wherein the providing of the layer of second resin comprises
• injecting a predetermined second volume of a molten second resin into the internal cavity of the die assembly, wherein the molten second resin flows into the internal cavity via a second outlet of a second resin channel,
• forming layer of second resin by advancing the moveable core into the internal cavity to apply a pre-determined second pressure on the molten second resin, such that the volume of the internal cavity is reduced, the advancing of the moveable core is done such that the moveable core closes the second outlet of the second resin channel, and
• measuring a second position of the moveable core,
• the method further comprises,
• adjusting the predetermined first volume of the molten first resin for a subsequent injecting when the position of the moveable core is different from a pre-determined first position, and
• adjusting the predetermined second volume of the molten second resin for a subsequent injecting when the position of the moveable core is different from a pre-determined second position.

A method of producing an injection molding comprising

• providing a layer of first resin and
• providing a layer of second resin that is provided next to the first resin layer,
• wherein the providing of the layer of first resin comprises
• injecting a predetermined first volume of a molten first resin into an internal cavity of a die assembly, wherein the molten first resin flows into the internal cavity via a first outlet of a first resin channel, and
• forming the layer of first resin by advancing a moveable core by a pre-determined distance into the internal cavity, such that the volume of the internal cavity is reduced, the advancing of the moveable core is done such that the moveable core closes the first outlet of the first resin channel, measuring the pressure being applied to the molten first resin, and repeating the advancing of the moveable core, and the measuring of the pressure when the measured pressure is less than a pre-determined first pressure;
• and
• wherein the providing of the layer of second resin comprises
• injecting a predetermined second volume of a molten second resin into the internal cavity of the die assembly, wherein the molten second resin flows into the internal cavity via a second outlet of a second resin channel, and
• forming the layer of second resin by advancing the moveable core by a pre-determined distance into the internal cavity, such that the volume of the internal cavity is reduced, the advancing of the moveable core is done such that the moveable core closes the second outlet of the second resin channel, measuring the pressure being applied to the molten second resin, and repeating the advancing of the moveable core, and the measuring of the pressure when the measured pressure is less than a pre-determined second pressure.